Anything above level 20. After level 20, the market should be driven by the gatherers and crafters. Armor, weapons and items above level 20, should not be sold by NPCs.
There's no incentive for anyone to buy any weapon or armor already at high level because of dungeons; npc should not be also offering items that can be made by crafters or can be gathered too.
I can understand having an initial point to help those that are new, but not all the way to level 50.
Imagine living in the real world where the government provides everyone with everything, then no one will able to compete or have the incentive to provide any service, no market would be able to survive like this.
That's how Eorzea economy is right now. Crafters and gatherers can't compete with the game, when everything is being provided by it.
Right now, there's no economy in this game, at least not a stable economy that relies on crafters and gatherers.
What do you think?